From 8d1ad3b21cedabb820bdc92b9395c98503e70f7b Mon Sep 17 00:00:00 2001 From: Mathias Fröhlich Date: Mon, 22 Nov 2010 23:19:52 +0100 Subject: r300g: Avoid returning values in a static array, fixing a potential race MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit (Marek: added the initializion of "vec" in the default statement) NOTE: This is a candidate for the 7.9 branch. Signed-off-by: Marek Olšák --- src/gallium/drivers/r300/r300_emit.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) (limited to 'src/gallium/drivers/r300/r300_emit.c') diff --git a/src/gallium/drivers/r300/r300_emit.c b/src/gallium/drivers/r300/r300_emit.c index c187f115da..5b6f82cd89 100644 --- a/src/gallium/drivers/r300/r300_emit.c +++ b/src/gallium/drivers/r300/r300_emit.c @@ -83,16 +83,20 @@ void r300_emit_dsa_state(struct r300_context* r300, unsigned size, void* state) } } -static const float * get_rc_constant_state( +static void get_rc_constant_state( + float vec[4], struct r300_context * r300, struct rc_constant * constant) { struct r300_textures_state* texstate = r300->textures_state.state; - static float vec[4] = { 0.0, 0.0, 0.0, 1.0 }; struct r300_texture *tex; assert(constant->Type == RC_CONSTANT_STATE); + /* vec should either be (0, 0, 0, 1), which should be a relatively safe + * RGBA or STRQ value, or it could be one of the RC_CONSTANT_STATE + * state factors. */ + switch (constant->u.State[0]) { /* Factor for converting rectangle coords to * normalized coords. Should only show up on non-r500. */ @@ -100,6 +104,8 @@ static const float * get_rc_constant_state( tex = r300_texture(texstate->sampler_views[constant->u.State[1]]->base.texture); vec[0] = 1.0 / tex->desc.width0; vec[1] = 1.0 / tex->desc.height0; + vec[2] = 0; + vec[3] = 1; break; case RC_STATE_R300_TEXSCALE_FACTOR: @@ -108,29 +114,31 @@ static const float * get_rc_constant_state( vec[0] = tex->desc.b.b.width0 / (tex->desc.width0 + 0.001f); vec[1] = tex->desc.b.b.height0 / (tex->desc.height0 + 0.001f); vec[2] = tex->desc.b.b.depth0 / (tex->desc.depth0 + 0.001f); + vec[3] = 1; break; case RC_STATE_R300_VIEWPORT_SCALE: vec[0] = r300->viewport.scale[0]; vec[1] = r300->viewport.scale[1]; vec[2] = r300->viewport.scale[2]; + vec[3] = 1; break; case RC_STATE_R300_VIEWPORT_OFFSET: vec[0] = r300->viewport.translate[0]; vec[1] = r300->viewport.translate[1]; vec[2] = r300->viewport.translate[2]; + vec[3] = 1; break; default: fprintf(stderr, "r300: Implementation error: " "Unknown RC_CONSTANT type %d\n", constant->u.State[0]); + vec[0] = 0; + vec[1] = 0; + vec[2] = 0; + vec[3] = 1; } - - /* This should either be (0, 0, 0, 1), which should be a relatively safe - * RGBA or STRQ value, or it could be one of the RC_CONSTANT_STATE - * state factors. */ - return vec; } /* Convert a normal single-precision float into the 7.16 format @@ -220,8 +228,9 @@ void r300_emit_fs_rc_constant_state(struct r300_context* r300, unsigned size, vo BEGIN_CS(size); for(i = first; i < end; ++i) { if (constants->Constants[i].Type == RC_CONSTANT_STATE) { - const float *data = - get_rc_constant_state(r300, &constants->Constants[i]); + float data[4]; + + get_rc_constant_state(data, r300, &constants->Constants[i]); OUT_CS_REG_SEQ(R300_PFS_PARAM_0_X + i * 16, 4); for (j = 0; j < 4; j++) @@ -279,8 +288,9 @@ void r500_emit_fs_rc_constant_state(struct r300_context* r300, unsigned size, vo BEGIN_CS(size); for(i = first; i < end; ++i) { if (constants->Constants[i].Type == RC_CONSTANT_STATE) { - const float *data = - get_rc_constant_state(r300, &constants->Constants[i]); + float data[4]; + + get_rc_constant_state(data, r300, &constants->Constants[i]); OUT_CS_REG(R500_GA_US_VECTOR_INDEX, R500_GA_US_VECTOR_INDEX_TYPE_CONST | -- cgit v1.2.3